You can check the pressure altitude page, but I believe such conditions would prevail if you were exposed to the atmosphere at between 38 and 27 thousand feet .-- talk ) 21 : 19, 14 September 2016 ( UTC)
32.
In aviation, "'pressure altitude "'is the indicated altitude when an altimeter is set to an agreed baseline pressure setting under certain circumstances where the aircraft's altimeter would be unable to give a useful readout of altitude.
33.
Starting in the late 1970s and early'80s, the Swissmetro was proposed to leverage the invention of the experimental German Transrapid maglev train, and operate in large underground tunnels reduced to the pressure altitude of at which the Concorde SST was certified to fly.
34.
They also worked on technical issues such as the analysis of waters of the US for the United States Department of Health, Education, and Welfare, engineering for military applications for the US Army and high altitude research and full pressure altitude suits for the USAF.
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There is no specific altitude threshold that can be considered safe for everyone and below which no one will develop altitude DCS . Nevertheless, there is very little evidence of altitude DCS occurring among healthy individuals ( who have not been underwater diving ) at pressure altitudes below.
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Because of the high operating altitude and the cockpit's partial pressurization, equivalent to 28, 000 feet pressure altitude, the pilot wears a partially pressurized space suit, which delivers the pilot's oxygen supply and provides emergency protection in case cabin pressure is lost.
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As the turbocharged aircraft climbs, however, the pilot ( or automated system ) can close the wastegate, forcing more exhaust gas through the turbocharger turbine, thereby maintaining manifold pressure during the climb, at least until the critical pressure altitude is reached ( when the wastegate is fully closed ), after which manifold pressure falls.
38.
Pressure altitude divided by 100 feet ( 30 m ) as the flight level, and is used above the transition altitude ( in the US, but may be as low as in other jurisdictions ); so when the altimeter reads 18, 000 ft on the standard pressure setting the aircraft is said to be at " Flight level 180 ".
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Density altitude is the altitude relative to the standard atmosphere conditions ( International Standard Atmosphere ) at which the air density would be equal to the indicated air density at the place of observation, or, in other words, the height when measured in terms of the density of the air rather than the distance from the ground . " Density Altitude " is the pressure altitude adjusted for non-standard temperature.
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The higher the altitude of exposure the greater is the risk of developing altitude DCS . Although exposures to incremental altitudes above show an incremental risk of altitude DCS, they do not show a direct relationship with the severity of the various types of DCS . Individual exposures to pressure altitudes between and have shown a low occurrence of altitude DCS . A US Air Force study of altitude DCS cases reported that 87 % of incidents occurred at or higher.
